Car-truck.



2 sums-sum 1.

7 WWW m 7 w 2 mm m CM 1 7 w. P. m

PATENTED MAY 26 J. MURPHY. GAR TRUCK. APPLIOATIOH'IILED AUG. 9, 1901.

WITNESSES J. MURPHY.

GAR TRUCK. APPLIOATIOIF FILED we. 9, 1901.

2 SHEETS-SHEET 2. v

4 Z (Ill HUIII WITNE$SES INVENTOR U ITED STATES PATENT OFFICE.

JOHN MURPHY, OFTITTSBURG, PENNSYLVANTA.

GAR-TRUCK.

No. sss,e4o.

To all whom it may concern: I Be it known that I, JOHN-MURPHY, *ofPittsburg, Allegheny county, Pennsylvania, have invented a newand'useful Improvement in Car-Trucks, of which the following is a full,clear, and exact description, reference being had to the accompanyingdrawings, forming which Figure 1 is a bottom planview of a car truckembodying my invention, one of the wheels being shown in section; Fig. 2is a side view of the same with the motor indicated in dotted lines;Figs. 3, and 4 are detail sectional views showing .the manner oiattaching and lubricating the connection rods or bars and Fig. 5 is a.detail view showing one manner of attaching the cranks to the caraxles. p T I My invention has relation to motive driven car trucks, andis designed to rovide means for increasing the traction of t e carwheels. In accordance with my invention, one ofthe axles of each truckis driven by direct gearingconnection with a motor, and both axles areextended through the journal boxes beyond the side bars of the truck,and are' ro'vided with cranks which are united at each side by aconnecting'rod or bar whereby both axles are, positively driven.

Referring to the accompanying drawings, in which I have shown one formof my invention, the numeral 2 designates the truck 2 frame which may beof-anxsuitable construction, and whose side bars are provided withguides 3 for the journal boxes 4.

5 and 6 designate the axles of the truck, and 7 the car wheels. i 8 isan electric motor which issleeved upon the axle 5 at one side andsupported from the end bar of the truck frame in any suitable or usualmanner at its opposite-side, its

\ armature shaft 9 having a pinion 10 whose teeth engage the teeth-of aspur wheel 11 rigidly secured to the axle 5. The journal boxes 4 areopen at both ends, and the axles 5 and 6 are extended entirely throughthe same beyond the side bars. To the projecting ends of each axle aresecured cranks 12 having pins 13. The two cranks at each side areeormected by the connecting bars or rods 14 whose end portions areprovided with bearings 15 which fit the pins 13. portions of theconnecting rods are formed Specification of Letters Patent. Applicationlfiled August 9, 1907. Serial No. 387,857.

'may be normally closed by the screw plugs part of this specification,in

The end Patented May 26, 1908.

with the lubricant chambers 16 which surround the bearing sleeves 15.These chambers are filled through the openings 17, which 18. The sleeves15 are each formed wi one or more slots or openings 19 extendingtherethrough and communicating at their inner ends with pieces 20 offelt or other lubricant conducting material, which are seated in theinner faces of the sleeves across the said openings in contact with thepins 13. The lubricant chambers 16 are preferably of ec-' centric form,as shown in Fig. 3, in order to provide increased capacity Withoutnecessitating the thickening of the end walls 21. This form of thelubricant chambers. is also advantageous, for the reason that the bodyof lubricant being eccentrically disposed with reference to the axis ofthe pin -13, the movement of the connecting bars or rods causes agreater agitation of the lubricant.

In order to relieve the connecting bars or rods from end thrusts of theaxles, the latter are provided between each wheel and the adjac ntjournal box with a thrust collar 22.

lie cranks 12 are referably removably secured to the axles by eys 22which can be removed to permit the cranks tobe taken'ofl' when it isdesired to remove and replace; thewheels. To this end the cranks aresplit, as shown at 23, in ig. 5 and are slipped onto the ends of the axes and secured by a bolt 24' which alsofits a recess 25 inthe axles asshown in Fig. 4 This enables a tight fit of the cranks on the axles,and'also permits endwise movement 6f the cranks on the axles.

The connecting rods are secured on the crank pins 13 by the nuts 26which are locked the set-screws 27.

Actual tests of a car truck embodying my invention have shown that theattractive force is increased approximately twenty-five percent. withoutincreasing the power of the motor, this being due to the fact that bothaxles are positively driven. My invention is applicable to both singleand double trucks, and may be applied to any ordinary form of truck bysubstituting journal boxes which will permit the axles to beextendedbeyond the side frames in the manner described, so that theconnecting rods can be attached to'the cranks on the end of the axlesoutside of the side frames.-

Various changes may be made in the deas described.

tails of construction and arrangement by those skilled in the artwithout departing from the s irit and scope of my invention.

at .I claim is 1. In an electric car truck, a truck frame having a pairof axles journaled therein, said axles being extended through theirjournal boxes and beyond the side frames of the truck, and carryingWheels at the inside of the side frames, cranks secured on the extendedends of the axles, bars connecting the cranks, and an electric motorgeared to one of said axles between the side frames, substantially asdescribed.

2. In an electric car truck, a truck frame having a pair of axlesjournaled therein, said axles being extended through their journal boxesand beyond the side frames of the truck, and carrying wheels at theinside of the side frames, cranks secured on the extended ends of theaxles, bars connecting the cranks,

and an electric motor geared to one of said axles between the sideframes, together with thrust bearings on the axles between the wheelsand side frames for relieving the conneeting bars from side-thrusts,substantially 3. In an electric car truck, a truck. frame having a pairof axles-journaled therein, said axles being extended through theirjournal boxes and beyond the side frames of the truck, and carryingwheels at the inside of the side frames, cranks secured on the extendedends of the axles, bars connecting the cranks, and an electric motorgeared to one of said axles between the side frames, together with meansfor lubricating the crankpins, substantially as described.

' 4. Inan electric car truck, having two axles, a driving motor arrangedto exert a rotary torque upon one of said axles-between the side framesof the truck, said axles having their wheels inside of said side framesand their ends extended through said frames and provided with cranks,and connecting rods or bars connecting the axle cranks at each side ofthe truck,-substantially as described.

5. In an electric car truck, a pair of axles having wheels inside thetruck frame and cranks outside the truck frame, a rod or bar connectingsaid cranks, and a motor connected to one axle between the side frames,substantially as described.

6; In a car truck, axles extended at their I ends beyond the side-framesof the truck, and having cranks at their extended ends, connecting rodsattached to the said crank, said rods having lubricantchambers thereinsurrounding the crank therewith, and means for driving one of the axlessubstantially as described.

In testimony whereof, I have hereunto set my hand.

JOHN 'MURPHY.

pins and communicating

